Cheapest priced copy (Shadowmoor): $0.35 at Card Kingdom, near mint, their price list as of .
Medicine Runner 
Creature — Elf Cleric · 2/1 · Common · Shadowmoor · #230
When this creature enters, you may remove a counter from target permanent.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shadowmoor | 230 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 May 2008You may target a permanent that doesn’t have a counter on it.
- 1 May 2008This can remove any kind of counter, not just a -1/-1 counter.